EP 0417527 B1 19940202 - Investment model and process for the prevention of deposit formation on models or castings from the investment material.
Title (en)
Investment model and process for the prevention of deposit formation on models or castings from the investment material.
Title (de)
Einbettmassenmodell und Verfahren zur Verhinderung des Ausblühens von Einbettmassenmodellen und Gussformen aus einer Gusseinbettmasse.
Title (fr)
Modèle et procédé pour la prévention de formation de dépÔts provenant du revêtement sur les modèles et objets coulés.
Publication
Application
Priority
DE 3930750 A 19890914
Abstract (en)
[origin: EP0417527A2] The invention relates to a casting investment compound for the preparation of investment compound models and casting moulds for alloy parts, especially in dental technology, using the MgO-SiO2-P2O5 ceramic system. The invention relates also to investment compound models and casting moulds consisting of the investment casting compound described and to a method of preventing efflorescence of investment compound models and casting moulds consisting of an investment casting compound. To avoid efflorescences (formation of sodium phosphate) it is proposed to add 0.01 to 10 % by mass of a water-soluble acid or acids or of at least one solid organic carboxylic acid having 2 to 10 carbon atoms, soluble in water and/or a C1-C4-alcohol.
IPC 1-7
IPC 8 full level
A61C 13/20 (2006.01); A61K 6/06 (2006.01); B22C 1/02 (2006.01); C04B 35/03 (2006.01); C04B 35/447 (2006.01); C04B 35/632 (2006.01)
CPC (source: EP)
C04B 35/447 (2013.01); C04B 35/632 (2013.01)
Designated contracting state (EPC)
FR GB IT
DOCDB simple family (publication)
EP 0417527 A2 19910320; EP 0417527 A3 19920226; EP 0417527 B1 19940202; CS 449490 A3 19920219; DE 3930750 A1 19910328; DE 3930750 C2 19930527; JP H03174941 A 19910730
DOCDB simple family (application)
EP 90116208 A 19900824; CS 449490 A 19900914; DE 3930750 A 19890914; JP 24284890 A 19900914